"Do not spoil what you have by desiring what you have not; remember that what you now have was once among the things you only hoped for."
— Epicurus
Do Not Spoil What You Have By Desiring What You Have Not Remember That What You
Do not spoil what you have by desiring what you have not; remember that what you now have was once among the things you only hoped for.
From Letters on Ethics
Source
Letter to Menoeceus